The first Variable category is the “Action Variable” category.
When expanding the view by clicking on the left arrow button you will see an overview of the available Action Variables:
The various colours refer to the different types such as int, double, string, bool, datetime and generic:
These fields in the “Action Variables” can be referred to in the “Processing” pane later.
To refer to these variables, prefix them with “av.” (for Action Variable) before the Action Variable name. eg. “av.SenderId”
Initially, each Action has its predefine variables.
You can click on the “+” button to add your own Action Variables:
Give your new variable a name and optionally assign a default value to it.
To assign a devault value, double click and edit this field again: